Chair armrest



FIG. 1 is a top front right perspective view of a chair armrest showing my design;

FIG. 2 is a bottom rear left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing of the chair armrest is for the purpose of illustrating portions of the article and forms no part of the claimed design. 

CLAIM The ornamental design for a chair armrest, as shown and described. 